I have an Advent 7111 Laptop
It has Media Center pre-installed and all of its drivers, which is very good.
1 GB of DDR2 memory and dual-core CPU
80 GBs
LCD widescreen which is ideal for watching movies
WiFi

Unfortunately half of the screen is broken due to being knocked, the laptop itself works perfectly but it's a pain to move stuff around the screen to just view it on one side. This is repairable for about £50 - £100 depending on where you go.

What sort of price should I be selling this for???

buy a screenf from ebay (£30 or so) and replace it yourself, its easy to do....

I had a look at screens on there, they were about £70 with postage.

Can't be bothered to change it anyway, happy to sell it and move onto something else.

Not sure what it is worth though in the current market and with the screen broken.

Unfortunately it won't be worth much. Firstly that there isn't much of a second hand market for laptops, secondly that Advent is not a very well respected brand and lastly that its broken!

I'd say with those specs expect £100 maximum